Peter eieth



(No Mqdel.)

P. BIRTH.

GORE ARBOR POR CASTING CURVE!) PIPE. No; 881,848. Patented Apr. 24, 1888. Ef y? 2 3i N PETERS. Plwmmhugmpmn wuhingmn. llc.

Unirse Starts A'rnivir Ottica PETER RIETH, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE L. YOLFF MANU- FACTURING COMPANY, OF SAME PLACE.

CORE-ARBOR FOR CASTlNG CURVED PIPE.

SPECIFICATION forming part of Letters Patent No.

Applicaion filed January Q3, i888. Serial No. 261,625.

fio @ZZ whom it may con/cern.-

Be it known that I, PETER RIE-rn, a citizen of the United States, residing in Chicago, in the county of Cool; and State of Illinois, have invented a new and useful Improvement in Core-Arbois for Casting Curved Pipe and other Articles, of which the following is a specification.

My invention relates to the art of casting metal traps and other articles cfa curved tubular shape, and more particularly to the construction ofthe arborwhich supports the sand core of the mold.

The ordinary lead traps used in plumbing have usually a comparatively small bore, and being of an S, U, or other curved shape, it is impracticable to cast them by the ordinary means employed in casting other articles; and as it is essential that the lead trap when cast should have approximately the samethickness throughout, it is necessary thatthe core should be rigidly supported throughout its length to prevent sagging at the bends or intermediate' points. Owing to the smallness ofthe bore, also, as wel'l as to the bends, it is in fact impracticable to remove the sand core and its rhor from the cast trap by the ordinary method oil shaking or rattling it out when the arbor is composed of a number of detachable pieces. The smallness of the bore and the bends render it impracticable to reach in with the hand or with an instrument and take hold of theinner pieces ofthe arbor. It the arbor should be composed of a number of loose detachable pieces, it would also not give the core sufficient rigidity at the bends and intermediate points to properly support it and produce a casting of even thickness throughout. In casting lead traps I find it essentiahin order to produce a trap with the necessary smooth interior wall, to employ a green sand core as contradistingnished from a dry or baked core; and with such cores, as is well known, owing to the steam and gases produced in the mold when the metal is poured, the core is subj ected to more or less strain or pressure during the pouring of the metal, and for this reason, also, it is essential to employ an arbor for the core capable of being rigidly held in place at all its parts.

My invention consists in an arbor-core com- 381,645, dated April 24, 1888.

(No model.)

posed. of a number of curved or bent sections hinged together and provided with a separable joint at an intermediate point, so that the intermediate hinged sections may be withdrawn with the end sections of the arbor to which they are hinged.

It also consists in the combination, with the hingedsection arbor, of a rigid support-ingframe in which the end sections ovl the arbor are mounted.

It further consists in the combination, with the hingedsection arbor, of a rigid supporting-frame and thumb screws or other clamp ing devices with which the end sections of the arbor are furnished, so that the arbor may be rigidly and firmly attached to iis supportingframe.

It further consists in providing the support-- ing-frame and the end sections of the arbor with registering lugs and grooves, to facilitate the proper adjustment or placing of the arbor in its supporting-frame.

It further consists in providing the supporting-frame of the arbor with slots to receive the clamp screws, so that the core and the casting formed around it may be removed from the supporting-frame by simply loosening the clamp-screws and without withdrawing them. This materially facilitates the operation.

My invention further consists in the novel devices and novel combinations of parts or devices herein shown and described, and more particularly pointed out in the claims.

In the accompanying drawings, a part of this specification, and in which similar letters of reference indicate like parts, Fig ure l is a plan view showing onehali` of the ilask, the arbor-supporting frame, the arbor, and also, in section, the sand core, figure the heavy black line may represent the space between the core and the iiasl; or the casting made therein. Fig. 2 is an enlarged partial vertical section on line 2 2 of Fig. 1.

which form and in this 9o Figs. 3 and 1 1 are cross-sections on lines 3 Sand 95 4 4L of Fig. l. Fig. 5 is an enlarged detail view of one of the hinges uniting the sections of the arbor, and Fig. 6 is an enlarged detail section of the intermediate detachable joint between the two parts of the arbor. Figs. T and 8 are plan views of the arbor, showing the forni of the same for making different kinds of traps,

, ment Iin a vertical plane.

-course it will be understood that the lugs, if

'to form the hand-hole opening a," in the trap Fig. 7 makes the same form of trap as Fig. l, with the exception that the hand-hole or cleanout opening at the lower bend of the trap is omitted.

In said drawings, A represents the flask.' It is preferably made of metal, and may be of any ordinary construction.

B represents the coresupporting frame, and C the sand core. The arbor inside the core, and which supports the same, is composed of two or more end sections, D D, and one or more curved or bent hinged intermediate sections, d. The hinged sections cl are united to the end sections, D, or to each other by vertical pivots or hinges d', so that such sections may only swing or move in a horizontal plane and be practically rigid in respect to any move- The preferred form of joint or hinge is shown in Fig. 5. The intermediate detachable joint, uniting the two parts of the arbor in such Way that they may be readily separated, preferably consists of a pin or lug, di, in one part, which entersacorresponding hole or recess, d3, in the other part. This is clearly shownin Fig. 6. Each of the end sections, D, is furnished at its extremity with an enlarged end or head, cF, which tits iiat and square against the face of the supporting-frame B, so that the arbor may be clamped rigidly against the same. A thumb-screw or other equivalent clamping device, b, serves to rigidly attach the end sections, D D, of the arbor to the frame B. This clamp-screw iits in a vertical slot or notch, b', out in the lower edge of the frame B. Bysimply loosening the clamp-screw the arbor and core may thus be removed from or placed in the supportingframe B. To facilitate the proper centering of the arbor and core in the supporting-frame B, I provide the frameB with registering lugs or guides b2, and the head @Pof the arbor'with corresponding grooves or recesses, di. Of

desired, may be placed on the arbor-head and the grooves in the frame B.

As shown in Fig. 1, the arbor is provided with three end sections, D D D, one being used x. Before the thumb-screws or clamping devices b b b are tightened the lugs d cl2-oi' the hinged sections d d may be readily tted into their sockets d3 d3 and the arbor put together, as shown in Fig. 1. Vhen the parts are thus placed together, the thumb-screws b are tightened, thus clamping the end sections, D D, of the arbor rigidly to the supporting-frame,and at the samel time rigidly fixing the hinged sections d d in place, as the lugs al'l cannot be disengaged from their sockets after the end sections, D D, are clamped rigidly to the frame B. By this means I thus form a perfectlyrigid curved core-arbor of the desired shape, which will firmly support the core while it is e being formed in the ordinary manner and While itis being placed in the iiask and the metalpoured. After the casting is formed, the arbor-frame is removed from theviiask, the

clamp-screws b loosened, and the arbor, core, and casting removed from the supportingframe B, when the end sections, D, of the arbor, with the sections d hinged thereto, may be readily pulled out ofthe casting or trap x. The heads (Z4 of the end sections are or should be made semi-cylindrical and iit in the iiask to close the ends of the mold.

The supporting-frame B and the flask A are provided with registering bearings a, so that they will iit properly together. The heads d* also serve this same purpose.

I claiml. The core-arbor for casting, tions hinged together, substantial iied.

2. The combination, with a supportingframe, of a core-arbor composed of sections hinged together, substantially as specified.

3. The combination, with a supportingframe, of an arbor composed of two or more end sections rigidly attached to said frame and one or more hinged sections, said arbor being provided with an intermediate detachable joint, substantially as specified.

4. The combination, with a supportingframe, of an arbor having two or more end sections, clamping devices for rigidly attaching said end sections to said frame, and one or more hinged sections, said arbor being furnished at an intermediate point With a detachablejoint adapted to be united or disunited only when the end sections or one of them are unclamped or loosened, substantially as specilied.

5. The combination, with supporting-frame B, furnished with slots or notches b, of arbor D and clamp-screws b, mounted in said slots or notches b', substantially as specified.

6. The combination, With the supportingframe B, ofthe arborl furnished with heads d4, provided with registering sockets or grooves, said frame being providedwith registering lugs or guides, substantially as specied.

7. The combination, with frame B, having slots or notches b, of an arbor composed of end sections, D D, and intermediate hinged sections, d, said arbor being provided with a detachablejoint at an intermediate point, and clamp-screws b, substantially as specilied.

8. The combination of frame B,having slots or notches b, of an arborcomposed of end sections, D D, and intermediate hinged sections, cZ, said arbor being provided with adetachablejoint at an intermediate point, and clamp screws b, said arbor and frame being provided Withregistering guides and grooves d5 b2, substantially as specified.

9. The combination, with supporting-frame B, oi' an arbor having three end sections, D D D, rigidly clamped to said frame, and intermediate hinged sections, d d, substantially as specified.

having secly as speci- PETER RIETH. Wit n esses:

JOHN CLIFFORD, EDMUND ADcooK.

IOO

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